values.c

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/*
 * Copyright (C) 1995.  Bill Brown <brown@gis.uiuc.edu> & Michael Shapiro
 *
 * This program is free software under the GPL (>=v2)
 * Read the file GPL.TXT coming with GRASS for details.
 */
#include <grass/datetime.h>


static int have(int x, const DateTime * dt)
{
    return datetime_is_between(x, dt->from, dt->to);
}


int datetime_check_year(const DateTime * dt, int year)
{
    if (!have(DATETIME_YEAR, dt))
        return datetime_error(-2, "datetime has no year");
    if (year < 0)
        return datetime_error(-1, "invalid datetime year");
    if (datetime_is_absolute(dt) && year <= 0)
        return datetime_error(-1, "invalid datetime year");

    return 0;
}


int datetime_check_month(const DateTime * dt, int month)
{
    if (!have(DATETIME_MONTH, dt))
        return datetime_error(-2, "datetime has no month");
    if (month < 0)
        return datetime_error(-1, "invalid datetime month");
    if (datetime_is_absolute(dt) && (month < 1 || month > 12))
        return datetime_error(-1, "invalid datetime month");
    /*
       if (dt->from != DATETIME_MONTH && month > 11)
       return datetime_error(-1,"invalid datetime month");
       BILL CHANGED TO: */

    if (datetime_is_relative(dt) && dt->from != DATETIME_MONTH && month > 11)
        return datetime_error(-1, "invalid datetime month");

    return 0;
}


int datetime_check_day(const DateTime * dt, int day)
{
    int month, year, ad;
    int stat;

    if (!have(DATETIME_DAY, dt))
        return datetime_error(-2, "datetime has no day");
    if (day < 0)
        return datetime_error(-1, "invalid datetime day");
    if (datetime_is_absolute(dt)) {
        stat = datetime_get_month(dt, &month);
        if (stat != 0)
            return stat;
        stat = datetime_get_year(dt, &year);
        if (stat != 0)
            return stat;
        ad = datetime_is_positive(dt);
        if (day < 1 || day > datetime_days_in_month(year, month, ad))
            return datetime_error(-1, "invalid datetime day");
    }

    return 0;
}


int datetime_check_hour(const DateTime * dt, int hour)
{
    if (!have(DATETIME_HOUR, dt))
        return datetime_error(-2, "datetime has no hour");
    if (hour < 0)
        return datetime_error(-1, "invalid datetime hour");
    if (dt->from != DATETIME_HOUR && hour > 23)
        return datetime_error(-1, "invalid datetime hour");

    return 0;
}


int datetime_check_minute(const DateTime * dt, int minute)
{
    if (!have(DATETIME_MINUTE, dt))
        return datetime_error(-2, "datetime has no minute");
    if (minute < 0)
        return datetime_error(-1, "invalid datetime minute");
    if (dt->from != DATETIME_MINUTE && minute > 59)
        return datetime_error(-1, "invalid datetime minute");

    return 0;
}


int datetime_check_second(const DateTime * dt, double second)
{
    if (!have(DATETIME_SECOND, dt))
        return datetime_error(-2, "datetime has no second");
    if (second < 0)
        return datetime_error(-1, "invalid datetime second");
    if (dt->from != DATETIME_SECOND && second >= 60.0)
        return datetime_error(-1, "invalid datetime second");

    return 0;
}


int datetime_check_fracsec(const DateTime * dt, int fracsec)
{
    if (!have(DATETIME_SECOND, dt))
        return datetime_error(-2, "datetime has no fracsec");
    if (fracsec < 0)
        return datetime_error(-1, "invalid datetime fracsec");
    return 0;
}


int datetime_get_year(const DateTime * dt, int *year)
{
    int stat;

    stat = datetime_check_year(dt, dt->year);
    if (stat == 0)
        *year = dt->year;

    return stat;
}


int datetime_set_year(DateTime * dt, int year)
{
    int stat;

    stat = datetime_check_year(dt, year);
    if (stat == 0) {
        dt->year = year;
        if (datetime_is_absolute(dt))
            dt->day = 0;
    }

    return stat;
}


int datetime_get_month(const DateTime * dt, int *month)
{
    int stat;

    stat = datetime_check_month(dt, dt->month);
    if (stat == 0)
        *month = dt->month;

    return stat;
}


int datetime_set_month(DateTime * dt, int month)
{
    int stat;

    stat = datetime_check_month(dt, month);
    if (stat == 0) {
        dt->month = month;
        if (datetime_is_absolute(dt))
            dt->day = 0;
    }

    return stat;
}


int datetime_get_day(const DateTime * dt, int *day)
{
    int stat;

    stat = datetime_check_day(dt, dt->day);
    if (stat == 0)
        *day = dt->day;

    return stat;
}


int datetime_set_day(DateTime * dt, int day)
{
    int stat;

    stat = datetime_check_day(dt, day);
    if (stat == 0)
        dt->day = day;

    return stat;
}


int datetime_get_hour(const DateTime * dt, int *hour)
{
    int stat;

    stat = datetime_check_hour(dt, dt->hour);
    if (stat == 0)
        *hour = dt->hour;

    return stat;
}


int datetime_set_hour(DateTime * dt, int hour)
{
    int stat;

    stat = datetime_check_hour(dt, hour);
    if (stat == 0)
        dt->hour = hour;

    return stat;
}


int datetime_get_minute(const DateTime * dt, int *minute)
{
    int stat;

    stat = datetime_check_minute(dt, dt->minute);
    if (stat == 0)
        *minute = dt->minute;

    return stat;
}


int datetime_set_minute(DateTime * dt, int minute)
{
    int stat;

    stat = datetime_check_minute(dt, minute);
    if (stat == 0)
        dt->minute = minute;

    return stat;
}


int datetime_get_second(const DateTime * dt, double *second)
{
    int stat;

    stat = datetime_check_second(dt, dt->second);
    if (stat == 0)
        *second = dt->second;

    return stat;
}


int datetime_set_second(DateTime * dt, double second)
{
    int stat;

    stat = datetime_check_second(dt, second);
    if (stat == 0)
        dt->second = second;

    return stat;
}


int datetime_get_fracsec(const DateTime * dt, int *fracsec)
{
    int stat;

    stat = datetime_check_fracsec(dt, dt->fracsec);
    if (stat == 0)
        *fracsec = dt->fracsec;

    return stat;
}


int datetime_set_fracsec(DateTime * dt, int fracsec)
{
    int stat;

    stat = datetime_check_fracsec(dt, fracsec);
    if (stat == 0)
        dt->fracsec = fracsec;

    return stat;
}